Decide which stability-testing operations can proceed

3What just happened?

The lab needs to know which shelf-life tests can go ahead and which must wait.

The 24-month test campaign and the answers to the regulator’s questions are bundled in one working package. The lab can’t move until Quality says what may proceed, what is on hold, and what would lift each hold.

Workspace cutoff date: 27 September 2026.

4Who has to do what?

Review the package as the lab’s quality reviewer: decide what can proceed, what is held, and what evidence lifts each hold.

The seat

Viktor Takacs, QC Stability Scientist

What a good answer looks like

It gives an operation-by-operation go/hold decision, catches every expired or lapsing item, states the shelf-life trend plainly, and keeps one consistent timeline.

What must be handed in

STB-AVI401-002_24M_campaign_decision_and_response.xlsx

5Which files decide it?

The campaign workbook, equipment, calibration and reference-sample records, the shelf-life data, and the regulator’s questions.

The model also has the rest of the company’s shared drive, its chat and its record systems. Finding the right files is part of the job. Flip through the key ones below.

Company documents

Some of the documents available to the model.

Laboratory stability · workbook

The next results do not exist yet

The company date is 27 September 2026. The pull schedule distinguishes completed laboratory work from the next planned measurements.

An agent can prepare the update now, but cannot present the scheduled 24-month results as already reported.

STB-AVI401-002XLSX

Source excerpt · Study!A1:B8

6What did the model do?

What GPT-6.1 Sol did, step by step.

In short: Sol preserves the baseline, makes the holds executable, corrects the lot mapping and testing chain, applies the chamber, reference-standard, and calibration dates, and states the shelf-life trend plainly.

1. Step 6. Inventories the campaign decision workbook and qualification records. Sol locates Tomas's consolidated campaign and authority-response workbook together with the laboratory qualification and calibration records.

   Tool call recorded in sessiontext(await tools.exec_command({cmd:"pwd && rg --files -g 'AGENTS.md' -g '*.xlsx'

2. Step 23. Inspects the calibration and reference-standard certificates. Sol renders and checks the calibration and reference-standard records, applying the 5 November 2026 RS-AVR-014 expiry and the 29 November 2026 CCI-02 calibration limit.

   Tool call recorded in sessiontext(await tools.exec_command({cmd:"pdftoppm -r 120 -png -singlefile 'Laboratory

3. Step 40. Completes the in-place QC review (14/15), missing only the combined timeline gate. Sol passes 14 of 15 checks—recomputing the OLS Impurity A bounds and setting operation-by-operation holds—missing only a single unified timeline linking the 12 November / 1 December test completions to the 6 November authority reply and 17 December commitment.

   Tool call recorded in sessiontext(await tools.exec_command({cmd:"python3 - <<'PY'\nfrom pathlib import Path\n

   Bears on: One timeline that adds up

Replay every step of the run →

7Which traps did it catch?

It caught 14 of 15.

Specialists wrote these checks from the records in the workspace. Each is a weak spot a reviewer or inspector would find. A check passes only when the submitted file provides the required evidence.

Missed

1. ✗

   One timeline that adds up R10

   Impurity tests run to 12 November and leak tests to 1 December, so the full dataset comes after the 6 November response, which must rely on existing evidence and name the gaps.

   If missed, the regulator is promised a complete dataset that can’t exist yet.

Caught

1. ✓

   Sign and date the review honestly R01

   The review is recorded under the reviewer’s name as of today (27 Sep 2026), without back- or forward-dating and without claiming to have changed official systems.

   If missed, nobody can tell who decided what, and when.

2. ✓

   Every fix needs an owner and a deadline R02

   Each problem sent back must name one responsible person, a due date, what it blocks, what evidence closes it, and exactly where that evidence lives.

   If missed, problems get flagged but never closed.

3. ✓

   Fix the batch-to-bag-size mix-up R03

   Two test batches are 100 mL bags and one is a 250 mL bag. The workbook wrongly lists a 250 mL and a 500 mL batch; there is no 500 mL batch.

   If missed, the wrong bags get tested and the worst case is never checked.

4. ✓

   List the complete testing chain R04

   Every test in the specification needs its storage chamber, method, instrument and reference sample listed, and nothing unrelated.

   If missed, a test can start with an unqualified piece of the chain.

5. ✓

   The storage chamber’s approval runs out R05

   The chamber holding the samples is calibrated until July 2027, but its separate qualification ends 17 October 2026, the day before the samples are due.

   If missed, the samples sit in an unqualified chamber and their results can be challenged.

6. ✓

   A reference sample expires mid-campaign R06

   The reference sample expires 5 November 2026. It can support the strength tests planned for 1–4 November, not the impurity tests planned for 8–12 November.

   If missed, the impurity results are measured against an expired reference.

7. ✓

   An instrument’s calibration ends before use R07

   The leak-test instrument was calibrated 29 November 2025 for 12 months, so it is out of calibration for its planned use on 30 November–1 December 2026.

   If missed, the leak-test results are invalid.

8. ✓

   Show the math so anyone can redo it R08

   The shelf-life calculation uses each batch’s actual results and gives projections and error figures others can reproduce.

   If missed, nobody can check the shelf-life conclusion.

9. ✓

   State the trend conclusion plainly R09

   Every batch’s upper estimate crosses the limit before 36 months; the worst at about 26.8 months. Today’s data don’t support 36 months.

   If missed, the key finding is buried and the shelf life stays overstated.

10. ✓

    Answer all seven regulator questions R11

    The regulator asked seven numbered questions, including a small one about the filing’s page layout. Each needs an owner, the evidence required, and a route back to the regulator.

    If missed, an unanswered question delays approval.

11. ✓

    Answer about the current wrapper R12

    The oxygen answer cites the approved wrapper and admits nobody has measured oxygen inside the bags; the proposed new film is out of scope.

    If missed, the regulator gets evidence about a wrapper that isn’t in use.

12. ✓

    “Within the limit” doesn’t settle it R13

    An accelerated-test result of 0.46% is under the 0.50% limit, but conflicting records mean someone must still formally decide whether it counts as a “significant change”.

    If missed, a formal regulatory question is waved away.

13. ✓

    Did the lab error hit other tests? R14

    A past test run was thrown out because of a mixing mistake. The record needs the cause, the replacement result, and a check of whether the same mistake affected other runs.

    If missed, other results made with the same mistake stay on file.

14. ✓

    Don’t claim more than the evidence shows R15

    The filter and IV-set answers must stay within the tested limits and name what’s missing, such as a hold longer than 8 hours being untested.

    If missed, the regulator is told something is covered when it isn’t.